Haiyore! Nyaruko-san (這いよれ! ニャル子さん, lit. "The Crawling Nyarlko") is a Japanese light novel series written by Manta Aisora with illustrations by Koin, inspired by H. P. Lovecraft's Cthulhu mythos. Seven volumes have been published by Soft Bank Creative under their GA Bunko imprint. A flash original video animation by DLE titled Haiyoru! Nyaruani was published in between October 2009 and March 2010. A flash anime television series by DLE, Haiyoru! Nyaruani: Remember My Mr. Lovecraft, aired in Japan between December 2010 and February 2011. A television anime series by Xebec began airing in April 2012. Two manga adaptations have been produced.

Contents

The story of Haiyore! Nyaruko-san centers around Nyaruko, a formless Cthulhu deity of chaos (Nyarlathotep) who can take on the shape of a seemingly ordinary silver-haired girl. Mahiro Yasaka is a normal high school boy who is chased by aliens one night, until Nyaruko saves him.